Tool holding system



FIG. 1 is a front elevational view showing my ornamental design for a tool holding system, shown with its belt clip component disengaged from the rest of the system;

FIG. 2 is a rear elevational view showing my ornamental design for a tool holding system, shown with its belt clip component disengaged from the rest of the system;

FIG. 3 is a top plan view showing my ornamental design for a tool holding system, shown with its belt clip component disengaged from the rest of the system;

FIG. 4 is a bottom plan view showing my ornamental design for a tool holding system, shown with its belt clip component disengaged from the rest of the system;

FIG. 5 is a front perspective view showing my ornamental design for a tool holding system, shown with its belt clip component disengaged from the rest of the system; and,

FIG. 6 is a schematic front elevational view showing my ornamental design for a tool holding system, shown with the system being used as intended.

The human figure and the work tool shown in phantom in FIG. 6 are shown for illustrative purposes only and form no part of the claimed design. 

I claim an ornamental design for a tool holding system, as shown and described. 